{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x260af0463316eb6576fb53c6d7bdeab5daaa1d218d17b7a6e9bd5557deb52658",
    "signature": "0x2a67585b238a02c595aec088bce9710c3d6c068c41b6b8195beda0b4e781c72c7e4a7089a50dcb99a17bf1afd75e96a743edbcdcad76454b7aed071f579555a01b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}